I'm sure it has happened to many of us: You travel to a country with a different culture, and suddenly, you find yourself in front of closed restaurant/shop/museum/etc doors (or, alternatively, you can't even find standing room), because all the locals are busy eating turkey or celebrating some religious or commercial holiday.
Is there some place that curates "critical dates" for different places that tell you when holidays are, and what the locals tend to do then, and ideally, what impact this may have on travellers?
And if there isn't such a place, what search strategy should I use to find that information myself?